Is it normal to be this interested in morbid stuff?

First off, not interested in committing it, nor do I romanticize it happening in real life. I've always found serial killers interesting, mainly from a psychological stand point. I also find stories with depressed or delusional characters the best. It's really interesting to me. Something about suicide makes me interested and makes me feel like humans actually matter, maybe because it's so tragic? I'm not sure. I'm actually diagnosed depressed myself, and sometimes I want to get better but sometimes I don't. I think I like this kind of thinking better, because being depressed and suicidal makes it seem like maybe life has a point compared to being happy and just living because whatever. There's nothing interesting about that, you can't feel that.